Dielectric response effects in attosecond time-resolved streaked photoelectron spectra of metal surfaces
arXiv:1102.0751 · doi:10.1103/PhysRevA.84.063403
Abstract
The release of conduction-band electrons from a metal surface by a sub-femtosecond extreme ultraviolet (XUV) pulse, and their propagation through the solid, provokes a dielectric response in the solid that acts back on the photoelectron wave packet. We calculated the (wake) potential associated with this photoelectron self-interaction in terms of bulk and surface plasmon excitations and show that it induces a considerable, XUV-frequency-dependent temporal shift in laser-streaked XUV photoemission spectra, suggesting the observation of the ultrafast solid-state dielectric response in contemporary streaked photoemission experiments.
4 pages and 4 figures, submitted to PRL